Behind the door as it opens?

开门的时候在门后边？

youdao

Behind the door as it opens?

我们敲门，但没有人开门。

youdao

Behind the door as it opens?

又有人敲门，我去开门。

youdao

It sort of opens things up, and we refer to this as the antecedent phrase.

可以说是开启一切,我们可以把它当做先行乐句

耶鲁公开课 - 聆听音乐课程节选

Sales expanding rapidly as it opens new outlets, 100 new stores planned this year.

FORBES: Magazine Article

Even as it opens up for shipping, it will remain a hazardous passage.

ECONOMIST: Banyan

Inflation and currencies weakened earnings, and Yum also pointed to labor costs and higher start-up expenses as it opens more restaurants.

FORBES: Remember Einhorn's Answer: Yum! Brands Doesn't Have The Best Ingredients For Growth